M20 swap: Exhaust Manifold

[Eddie.]

Basically, I'm trying to figure out what manifold to use for my M20B25 swap.

My understanding is that the E30 manifold won't fit around the steering linkage, and the E21 6cyl manifold doesn't match the exhaust ports on the M20.

Fortunately, I've got a series 1, so no silly brake linkage to work around.

Is there any "off the shelf option" (I'm guessing not) or what have people done in the past? At the moment, I think I'm favouring cutting and modding an E30 manifold, but I'm open to suggestion.

Cheers.

[rob0r]

I never considered the M20B25 exhaust ports were different to the E21 exhaust manifolds, I've pulled apart a few M20B25 E21s and they all had the standard E21 M20 exhaust manifold. If I remember I'll check again.

[Jeroen]

I'd suspect the E30 manifolds to be larger because of the larger ports in the E30 head

[drjim]

As per my PM I just used the one off the 2.0 auto that was in my car when I got it. Ports don't match but it still works.

[Eddie.]

Yeah got your PM, nice one.

Looks like I'll head down that route then I guess.

[drjim]

Shouldn't be too hard to open out ports on manifold with a die grinder, I just haven't had time.